Engine accessory



July 4, 1950 R. M. NARDONE ENGINE ACCESSORY 2 Shee ts-Sheet 1 Filed Dec. 9, 1947 INVENTOR. Roman M. A/ARDONE July 4, 1950 R. M. NARDONE ENGINE ACCESSORY 2 Sheets-Sheet 2 Filed Dec. 9, 1947 5 .1 WW: I .5 N w w a r vllig 4 7 J w MN Patented July 4, 1950 UNITED STATES PATENT. orncr.

ENGINE ACCESSORY Romeo M. Nardone, Teaneck, N. J assignor to Joseph J. Mascuch, Maplewood, N. J.

Application December 9, 1947, Serial No. 790,588

3 Claims. 1

This invention relates to engine accessories, and particularly to the means for attaching and supporting an engine accessory.

Engine accessories such as starters, generators, compressors, etc., usually have a circular flange, called a mounting flange, adapted to abut a circular mounting pad provided on the surface of the engine housing, the engine pad being centrally apertured to permit the accessory main shaft, or engine shaft-engaging clutch to pass through. The engine pad is also equipped with studs spaced about its annular surface, and mounting of the accessory on the engine pad is effected by suspending the accessory flange, above referred to, on the projecting ends of these studs. the accessory flange having stud-receiving holes to make such suspension possible. Retaining nuts are then threaded to the stud ends to hold the accessory in the suspended position.

The arrangement above described is quite satisfactory, so long as the diameter of the accessory flange is such as to cause its stud-receiving holes to align accurately with the stud circle on the engine pad; but as engine pad stud circles are of graduated diameters, according to the capacity and style of engine-stud circles of five inch diameter being used as commonly as those of inch diameter-an accessory equipped with a mounting flange whose mounting holes are on a 5%. inch circle cannot be attached to an engine pad having a five inch diameter stud circle. As a consequence, it has heretofore been necessary to maintain a double stock supply of accessories at all engine servicing depots, in order to meet the dual. conditions just described.

An object of the present invention is to provide means whereby all engine accessories will be attachable to both sizes of engine pads, thus eliminating all mis-fit problems.

A second object of the invention is to provide means for securing the accessory to the engine pad in such manner as to permit subsequent removal without'disturbing the stud nuts.

Another object is to provide a single securing means to replace the multiple securing means constituted by the studs and fastening nuts therefor; the studs and stud nuts being retained, however, as locating, supporting, and torque reaction receivers.

These and other features of the invention will be further described with reference to the accompanying drawings illustrating the preferred embodiment of the invention. It is to be understood, of course, that other embodiments are pos,

. 2 sible, and that the invention is limited only the scope of the appended claims.

In the drawings:

Fig. 1 is a view, partly in elevation and partly in central vertical section, ofthe forward section of an engine starter, showing also'the novel at taching and supporting means as they -appear;in relation to an engine mounting pad of the socalled six inch size;

Fig. 2 is a transverse sectional'view along the line 2--2 of Fig. 1;. v I

Fig. 3 is a view similar to Fig. 1, but in relation to an engine mounting pad of the .seven inch.

size; and

Fig. 4 is a transverse sectional view along the line 4-4 of Fig. 3.

p In Fig. 1 there is indicated,v at 5, aportion of an engine mounting pad equipped with the usual studs 6 that normally receive the starter flange and fastening nuts; .but in accordance with the present invention there is associated with the starter flange 1 and the engine pad 5 a pair of complementary securing rings 8 and 9, having inter-engaging threaded portions in and II, respectively; and the starter flange has two sets of openings I2 and 13, the openings l2 permitting the said flange to be pushed up against the securing ring 8 without interference from stud nuts I 4, and the openings l3 permitting the flange 1 to be similarly pushed into position without interference from stud nuts l5, the latter being shown in Figs. 3 and 4 as the fastening means for ring 8 when the engine stud circle is of a 5% inch, rather than a five inch, diameter.

Thus, by the use of the complementary securing rings 8 and 9, and the specially constructed starter flange 1, with its two sets of openings l2, l3, it becomes possible to fit such a flange into position on either a six or a seven inch mounting pad, and to lock it in said position simply by threading ring 9 onto the receiving rim I0 of the ring 8; the inner end of the ring 9 being adapted to exert an axially directed thrust on the rim I6 of the starter flange 1, to secure it in position. Conversely, whenever it becomes necessary to remove the starter for any reason, the only operation required is to unscrew the ring 9 from rim [0, whereupon the entire starter may be withdrawn from the engine pad by simply drawing flange 1 back over the nuts M (or 15, Fig. 3, as the case may be, depending upon whether a six or a seven inch pad is involved) there being no necessity of disturbing the stud nuts, studs, or securing ring 8 on any such occasion, as openings l2 and I3 are large enough to prevent interference between said openings, on the one hand, and

, nuts I4 and IE, on the other. In fact, after their initial installation, the studs, stud nuts and securing ring 8 may be considered to be permanently attached elements of the engine, along with the mounting pad 5 (or 521., Fig. 3).

Since the openings [2, [3 are large enough to clear the corners of the stud nuts, it follows that they are considerably larger than the diameter of,

the studs themselves. It'is, therefore, necessary to provide spacers, as at 2|, to take up the difference in diameters, as between flange openings and studs, also to take up the space, in an axial direction, as between the studrnuts and the ring 8. These spacers 2|, therefore, takeaxial thrust as well as the torque reaction.

It will be understood that iflange I is integral with the housing 22 of the starter or other. engine accessory to which the invention is to be applied. The starter illustrated has a rotatable clutch element 23 of the threetooth'type, the teeth'being so formed as to be-drivably engageable with another clutch element (not shown) carried by-the engine shaft, provided the engaged clutch element has'the same number of teeth, or some integral multiple thereof;

1. In combination with an engine housinghaving, an accessory, mounting pad, a series of studs secured to said pad and having-their axes dispqsedin a circle whose. center lies onthe longitudinal axis of the accessory to be mounted thereon, and means for mounting on said studs enaccessory of a standard diameter, said'mounting means including a flange integral with said accessqryand provided with plural circular rows oi..openings., which. rows. have diameters corresponding to hose of dif erent sizes of engine pads. sa d, flange bein .iurther provided, with a-r arwardly turned rim at its peri hery,.and

means including a pair of complementary elements, one interposed between said mounting pad and said flange, and the other secured thereto and abutting said rim to hold said flange in position upon said studs.

2. In combination with an engine housing having an accessory mounting pad, a series of studs secured to said engine pad and having their axes disposed ina circle Whosecenter lies on the longitudinal axis of the accessory to be mounted thereon, fastening members threaded to said studs, and means distinct from said fastening members for securing said accessory to said engine pad,,said securing means including a pair of complementary elements, one of said complementary elements being interposed between said engine pad" and said fastening members, and permanently held thereby.

3. Apparatus as defined in claim 2, wherein the other of said complementary elements coacts with said first complementary element to constitute the sole securing means for the accessory;

ROMEOIM. NARDONE;

' REFERENCES CITED The following references are of record in the fileoi this patent;

UNITED STATES PATENTS Number Name Date 1,182,146 Crispin May 9, 1916 1,474,995 Burroughs Nov.,20,,1923 2,368,537 Gilbert J an.v 30, 1945 2,450,422 Elks -c.. Oct. 5, 1948 FOREIGN v: PATENTS Number Country Date 377,386 Germany June 18, 1923" 631,211 Germany June 15, 1936 

